Acquisition of a CT Scanner for Research in Engineering and Sciences at Montana State

小行星601567 将购买一台计算机断层摄影（CT）X射线扫描仪，以扩大蒙大拿州立大学目前正在进行的或正在考虑新的研究方向的几个研究项目的能力。 研究领域包括：（1）高山雪的变质作用和雪的微观结构变化，（2）南极积雪的长期变质作用，（3）海冰和非盐冰的微观力学，颗粒材料的微观结构和力学性能之间的关系，（4）复合材料的损伤效应，以及（5）南极湖冰的研究。 此外，获得扫描仪将为与日本科学家，特别是与国家地球科学和灾害预防中心（NEID）建立长期合作研究提供很大的可能性，以进行雪，冰和极地积雪研究。 扫描仪是一个可移动的系统，可将其移到偏远地点进行实地调查。 该扫描仪总重量约为1000 kg，采用工业质量的Seifert恒电位X射线源和探测器，采用1024 X 1024像素和12位分辨率（4096灰度级）的CDD。 还包括一台奔腾电脑控制扫描仪，彩色打印机，备份数字磁带铅屏蔽资格的系统作为一个无辐射的环境。 它具有扫描薄至0.1 mm的切片的能力，并且对于需要研究非常小的细节的情况，具有小至10 um的空间分辨率。 工程学院教授的课程旨在使用这种仪器来评估材料的内部结构。 这些课程包括材料科学和土壤力学的本科和研究生课程。 ***

601567 Brown A compute tomography (CT) X-ray scanner will be purchased for the purpose of expanding the capabilities of several research projects either currently in progress at Montana State University or being considered for new research directions. Areas of research include studies on (1) metamorphism of alpine snow and changes in microstructure of snow, (2) long term metamorphism of Antarctic firn, (3) micromechanics of sea ice and non-saline ice, relationship between microstructure and mechanical properties of granular materials, (4) damage effects in composite materials, and (5) studies of lake ice in Antarctica. In addition, the acquisition of the scanner will open up the strong possibility of establishing long-term cooperative studies with Japanese scientist, particularly with the National Center for Earth Science and Disaster Prevention (NEID) for snow, ice and polar firn research. The scanner is a transportable system which would enable it to be moved to remote sites for field investigations. With a total weight of approximately 1000kg, the scanner incorporates an industrial quality Seifert constant potential x-ray source and a detector utilizing a CDD with 1024 X 1024 pixels and a 12 bit resolution (4096 grey scales). Also included are a Pentium computer to control the scanner, a color printer, a backup digital tape lead shielding to qualify the system as a radiation-free environment. It has the capability of scanning slices as thin as 0.1 mm and has a spatial resolution as small as 10 um for those instances where very small details need to be studied. Courses taught in the Engineering college intend to use this instrument to evaluate internal structure of materials. These courses included both undergraduate and graduate courses in materials science and soils mechanics. ***